US20080295612A1 - Torque Sensor - Google Patents

Torque Sensor Download PDF

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Publication number
US20080295612A1
US20080295612A1 US11/667,407 US66740705A US2008295612A1 US 20080295612 A1 US20080295612 A1 US 20080295612A1 US 66740705 A US66740705 A US 66740705A US 2008295612 A1 US2008295612 A1 US 2008295612A1
Authority
US
United States
Prior art keywords
sensor
torque sensor
housing
static
sensor unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/667,407
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English (en)
Inventor
Dirk Rachui
Frank Jerems
Jens Thom
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Assigned to VALEO SCHALTER UND SENOREN GMBH reassignment VALEO SCHALTER UND SENOREN GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JEREMS, FRANK, RACHUI, DIRK, THOM, JENS
Publication of US20080295612A1 publication Critical patent/US20080295612A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means

Definitions

  • the invention concerns a torque sensor comprising a housing, a torsion device which is rotationally mounted inside the housing, a dynamic sensor unit which is rotationally fixed to the torsion device, and a static sensor unit cooperating with the dynamic sensor unit.
  • EP-A-1 269 133 discloses a torque sensor comprising a torsion device which is formed by a torsion rod.
  • One end of the torsion rod comprises two ferromagnetic wheels with axially downwardly projecting teeth, and the other end comprises a ring magnet, which are rotated relative to each other when a torque acts on the torsion device.
  • This torsion is detected by a magnet-sensitive element, e.g. a Hall sensor.
  • the ferromagnetic wheels, the ring magnet, and the magnet sensor are constructed as one unit which, as a whole, is pushed onto the torsion device and connected thereto. It has turned out that in case of a defect, the whole unit must be exchanged even when only one electronic component fails.
  • the mounting tolerances have a disadvantageous effect on the measuring results, since the ferromagnetic wheels, the ring magnet and the sensor element are constructed as a rigid, inflexible unit.
  • DE-A-102 56 322 discloses a further torque sensor, wherein fixing of the Hall sensor is not defined.
  • the dynamic unit and the static unit are constructed as a torque unit in a housing. This torque unit can be handled only as a unit.
  • the measured data is generated from the dynamic sensor unit and the static sensor unit, wherein the dynamic sensor unit is mounted to the torsion means and the static sensor unit is indirectly connected to the housing, i.e. not rigidly but elastically via a decoupling device.
  • the static sensor unit can change its position, since it is quasi elastically suspended. This compensates for mounting tolerances.
  • a further substantial advantage is that the static sensor unit can be exchanged independently of the dynamic sensor unit, since it is mounted to the housing.
  • a torque sensor of this design requires less maintenance and is also less sensitive to mounting tolerances.
  • the static sensor unit has a first sensor part which is mounted to the housing via the decoupling device, and a second sensor part which engages the torsion means.
  • a first sensor part By dividing the static sensor unit into several, in particular, a first and a second sensor part, one sensor part can be directly connected to the dynamic sensor unit, such that this second sensor part can be handled together with the dynamic sensor unit.
  • the first sensor part can be separately handled and is mounted to the housing.
  • the first sensor part abuts the housing via the elastic coupling device and its position can therefore be corrected.
  • Both static mounting tolerances and dynamic tolerances during operation of the sensor i.e. axial and radial motion of the shaft relative to the housing, thereby have less effect on the static sensor unit, since it can follow the mounting tolerances. Distortions are prevented.
  • the two sensor parts are detachably connected to each other. Only the first sensor part which is mounted to the housing must thereby be released to perform maintenance and/or replace parts.
  • the static sensor unit is moreover detachably connected to the housing. For this reason, both, i.e. the first and the second sensor parts can be removed together from the housing and from the dynamic sensor unit. This also substantially facilitates maintenance and replacement of parts.
  • a detachable connection is realized e.g. by a screw connection, a locking connection or a clamping connection. Other detachable connections are also feasible.
  • the detachable connection can be accessed from outside the housing in order to further facilitate maintenance, mounting and/or replacement work.
  • the torque sensor need not be disassembled into its individual parts, as in prior art, in case of an electronic defect to exchange components.
  • the static sensor unit and, when the construction comprises several parts, only the first sensor part preferably comprises the electronic components of the torque sensor.
  • the electronic components are therefore not distributed over all sensor units but combined in the static sensor unit and, in particular, in a first sensor part of this static sensor unit. Since exchange from outside of the housing is possible, the torque sensor need not be completely detached.
  • the static sensor unit can be optimally decoupled from the housing in that the decoupling device is elastic in a radial and/or axial direction.
  • the decoupling device may thereby be designed e.g. as a membrane or membrane ring, whereby the membrane or membrane ring additionally seals the housing or housing interior.
  • the decoupling device in accordance with the invention is designed as a part of a lid that closes a housing opening.
  • the inside of the housing can be accessed after removal of the lid, thereby also removing the static sensor unit or a first sensor part of the static sensor unit. This also substantially facilitates maintenance work.
  • the decoupling device is e.g. produced from plastic material, in particular, an elastomer, of spring steel, in particular a corrugated tube or a corresponding elastic material. Such materials or components are elastic, can transmit forces and correct position deviations.
  • FIG. 1 shows an exploded view of a torque sensor with partially cut-open housing
  • FIG. 2 shows a perspective view of the torque sensor with partially cut-open housing
  • FIG. 3 shows a side view of the torque sensor with section III-III in accordance with FIG. 2 .
  • Reference numeral 10 in FIG. 1 shows a torque sensor comprising a torsion device 12 which is rotationally disposed in a housing 14 via bearings, e.g. ball bearings or the like (not shown).
  • Two circular ring-shaped, ferromagnetic torque sensor units are mounted to the torsion device 12 , which are designated below as dynamic sensor unit 16 .
  • This dynamic sensor unit 16 is partially overlapped by two magnetic flux concentrators 18 , wherein the magnetic flux concentrators 18 are part of a static sensor unit 20 .
  • This static sensor unit 20 has a sliding ring 22 which encompasses a sliding bearing (not shown) of the torsion device 12 and is supported on shoulders 26 ( FIG. 2 ) provided on the inner side of the housing 14 via axially downwardly protruding wings 24 , such that the static sensor unit 20 does not rotate together with the torsion device 12 .
  • the static sensor unit 20 is formed by a first sensor part 28 and a second sensor part 30 , wherein the second sensor part 30 surrounds the torsion device 12 and the first sensor part 28 is mounted to a lid 32 which closes a housing opening 34 .
  • the two sensor parts 28 and 30 can be rigidly connected via a screw connection 36 ( FIG. 3 ), wherein the screw connection 36 can be accessed from outside of the housing 14 .
  • the lid 32 itself is screwed tightly to a flange 40 of the housing 14 using screws 38 .
  • FIGS. 1 and 2 show that the first sensor part 28 is fixed in the lid 32 via a decoupling device 42 , wherein the decoupling device 42 completely surrounds the first sensor part 28 and elastically or flexibly supports it.
  • the decoupling device 42 decouples the first sensor part 28 from the lid 32 and thereby from the housing 14 .
  • This decoupling device 42 is e.g. a plastic membrane which has elastic properties both in axial and radial directions.
  • All electronic components are moreover housed in the first sensor part 28 , such that only the lid 32 must be removed from the housing 14 and replaced by a new lid for maintenance and/or repair. Complete disassembly of the torque sensor 10 is not required.
  • the upper side 44 of the second sensor part 30 is designed such that the electronic components of the first sensor part 28 , such as Hall sensors and the like, can be inserted from the top, i.e. orthogonally to the upper side 44 , into the second sensor part 30 .

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Power Steering Mechanism (AREA)
US11/667,407 2004-11-10 2005-08-04 Torque Sensor Abandoned US20080295612A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004055124.3 2004-11-10
DE102004055124.3A DE102004055124B4 (de) 2004-11-10 2004-11-10 Drehmomentsensor
PCT/EP2005/008436 WO2006050762A1 (de) 2004-11-10 2005-08-04 Drehmomentsensor

Publications (1)

Publication Number Publication Date
US20080295612A1 true US20080295612A1 (en) 2008-12-04

Family

ID=35820797

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/667,407 Abandoned US20080295612A1 (en) 2004-11-10 2005-08-04 Torque Sensor

Country Status (4)

Country Link
US (1) US20080295612A1 (de)
EP (1) EP1809996A1 (de)
DE (1) DE102004055124B4 (de)
WO (1) WO2006050762A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100139419A1 (en) * 2006-12-07 2010-06-10 Continental Teves Ag & Co. Ohg Torque Sensor Arrangement
CN103038617A (zh) * 2010-05-14 2013-04-10 Trw汽车美国有限责任公司 扭矩传感器组件及其制造方法
WO2019228952A1 (de) * 2018-05-29 2019-12-05 Thyssenkrupp Presta Ag Drehmomentsensoreinheit mit eingepresster sensoreinheit

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007057292A1 (de) 2007-11-28 2009-06-04 Valeo Schalter Und Sensoren Gmbh Vorrichtung und Verfahren zur Befestigung einer Drehmoment- oder Drehwinkelsensoranordnung an einer Welle
DE102008015274A1 (de) 2008-03-20 2009-09-24 Valeo Schalter Und Sensoren Gmbh Sensorbaugruppe für eine Drehmoment- und/oder Drehwinkelsensoranordnung
DE102009047447A1 (de) * 2009-12-03 2011-06-09 Continental Teves Ag & Co. Ohg Sensoranordnung mit Positioniereinrichtung
DE102019111846B4 (de) * 2019-05-07 2020-12-03 Valeo Schalter Und Sensoren Gmbh Drehmomentsensorbaugruppe, Drehmomentsensorvorrichtung und Fahrzeug
DE102020109605A1 (de) 2020-04-07 2021-10-07 Schaeffler Technologies AG & Co. KG Sensorlageranordnung
CN112763113B (zh) * 2020-12-21 2022-09-27 上海罗玛动力科技有限公司 一种动态扭矩传感装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942112A (en) * 1974-05-06 1976-03-02 Westbrook Carl M Rotary seal shaft rotation transducer
US4414854A (en) * 1981-10-30 1983-11-15 Mts Systems Corporation Rotary actuator assembly
US5255567A (en) * 1990-06-30 1993-10-26 Nippon Densan Corporation Torque transducer
US5307691A (en) * 1990-06-30 1994-05-03 Kubota Corporation Torque transducer
US6347554B1 (en) * 2000-02-29 2002-02-19 C.E. Electronics, Inc. Torque transducer assembly
US6422336B1 (en) * 1998-06-26 2002-07-23 Zf Lenksysteme Gmbh Electrically assisted power steering system for motor vehicles
US6439067B1 (en) * 1999-02-05 2002-08-27 Curtis Instruments, Inc. Shaft sensor assembly for angular velocity, torque, and power

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784002A (en) * 1986-12-17 1988-11-15 Atsugi Motor Parts Company, Limited Torque sensor
GB2208716B (en) * 1987-08-12 1991-02-27 Smiths Industries Plc Speed and torque sensors
US4984474A (en) * 1988-09-30 1991-01-15 Copal Company Limited Torque sensor
FR2821668B1 (fr) * 2001-03-02 2003-05-02 Moving Magnet Tech Capteur de position, notamment destine a la detection de la torsion d'une colonne de direction
KR100397712B1 (ko) * 2001-03-16 2003-09-13 주식회사 만도 차량용 토크센서
EP1241074B1 (de) * 2001-03-16 2006-07-19 Mando Corporation Drehmomentsensor für ein Fahrzeug
DE10222118B4 (de) * 2001-05-18 2006-10-05 Denso Corp., Kariya Drehmomentsensor und elektrisches Servolenkungssystem mit Drehmomentsensor
US6644134B2 (en) * 2002-02-21 2003-11-11 Visteon Global Technologies, Inc. Flux brush torque sensor
JP2003329523A (ja) * 2002-03-07 2003-11-19 Denso Corp トルクセンサ
DE10256322A1 (de) * 2002-11-28 2004-06-09 Valeo Schalter Und Sensoren Gmbh Vorrichtung zum Bestimmen eines auf eine Welle ausgeübten Drehmoments
DE10316124A1 (de) * 2003-04-04 2004-10-28 Valeo Schalter Und Sensoren Gmbh Vorrichtung zum Bestimmen eines auf eine Welle ausgeübten Drehmoments
JP2005077305A (ja) * 2003-09-02 2005-03-24 Matsushita Electric Ind Co Ltd 回転角度およびトルク検出装置
DE102004023801A1 (de) * 2004-01-20 2005-08-25 Valeo Schalter Und Sensoren Gmbh Vorrichtung zum Bestimmen eines Lenkwinkels und eines an einer Lenkwelle ausgeübten Drehmoments

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942112A (en) * 1974-05-06 1976-03-02 Westbrook Carl M Rotary seal shaft rotation transducer
US4414854A (en) * 1981-10-30 1983-11-15 Mts Systems Corporation Rotary actuator assembly
US5255567A (en) * 1990-06-30 1993-10-26 Nippon Densan Corporation Torque transducer
US5307691A (en) * 1990-06-30 1994-05-03 Kubota Corporation Torque transducer
US6422336B1 (en) * 1998-06-26 2002-07-23 Zf Lenksysteme Gmbh Electrically assisted power steering system for motor vehicles
US6439067B1 (en) * 1999-02-05 2002-08-27 Curtis Instruments, Inc. Shaft sensor assembly for angular velocity, torque, and power
US6347554B1 (en) * 2000-02-29 2002-02-19 C.E. Electronics, Inc. Torque transducer assembly

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100139419A1 (en) * 2006-12-07 2010-06-10 Continental Teves Ag & Co. Ohg Torque Sensor Arrangement
US20100313681A1 (en) * 2006-12-07 2010-12-16 Manfred Goll Sensor arrangement for measuring a torque
US8087306B2 (en) 2006-12-07 2012-01-03 Continental Teves Ag & Co. Ohg Sensor arrangement for measuring a torque
US8286507B2 (en) 2006-12-07 2012-10-16 Continental Teves Ag & Co. Ohg Torque sensor arrangement
CN103038617A (zh) * 2010-05-14 2013-04-10 Trw汽车美国有限责任公司 扭矩传感器组件及其制造方法
JP2013531224A (ja) * 2010-05-14 2013-08-01 ティーアールダブリュー・オートモーティブ・ユーエス・エルエルシー トルク・センサ組立体およびその製作方法
US9021895B2 (en) 2010-05-14 2015-05-05 Trw Automotive U.S. Llc Torque sensor assembly and method for producing same
CN108128352A (zh) * 2010-05-14 2018-06-08 Trw汽车美国有限责任公司 扭矩传感器组件及其制造方法
KR101864903B1 (ko) 2010-05-14 2018-07-04 티알더블유 오토모티브 유.에스.엘엘씨 토오크 센서 조립체 및 그 생산 방법
WO2019228952A1 (de) * 2018-05-29 2019-12-05 Thyssenkrupp Presta Ag Drehmomentsensoreinheit mit eingepresster sensoreinheit
CN112166311A (zh) * 2018-05-29 2021-01-01 蒂森克虏伯普利斯坦股份公司 具有压入式传感器单元的扭矩传感器单元

Also Published As

Publication number Publication date
EP1809996A1 (de) 2007-07-25
WO2006050762A1 (de) 2006-05-18
DE102004055124B4 (de) 2017-06-01
DE102004055124A1 (de) 2006-05-11

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AS Assignment

Owner name: VALEO SCHALTER UND SENOREN GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RACHUI, DIRK;JEREMS, FRANK;THOM, JENS;REEL/FRAME:020672/0391;SIGNING DATES FROM 20070514 TO 20070529

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION